can someone explain how to get the last n messages from a chat?

[divramod]

hey,

i already have the following code get the last message of a chat.
but i like to get the last n messages from a chat.
can someone explain to me how to accomplish that?
i am fairly new to tdl.
the problem unfolds in the function getChatHistory().
thx in advance for possible help!

const { Client } = require('tdl')
const { TDLib } = require('tdl-tdlib-addon')

const client = new Client(new TDLib('/usr/lib/libtdjson.so'), {
  apiId: myId,
  apiHash: 'myHash',
})

async function getChatHistory(lChatId, lastMsgId) {
  return client.invoke({
    _: 'getChatHistory',
    chat_id: lChatId,
    from_message_id: lastMsgId,
    offset: -3,
    limit: 5,
    only_local: false
  })
}

async function main() {
  await client.connectAndLogin()
  const chats = await getChats(3)

  for (var i = 0, len = chats.chat_ids.length; i < len; i++) {
    const lChatId = chats.chat_ids[i]
    const lChat = await getChat(lChatId)
    console.log('') 
    console.log(`[CHAT] ${lChat.title} [id] ${lChat.id}`) 
    const lastMsgId = lChat.last_message.id
    try {
      const lMsgO = await getChatHistory(lChatId, lastMsgId)
      const lMsgA = lMsgO.messages
      for (var y = 0, lenM = lMsgA.length; y < lenM; y++) {
        const lMsg = lMsgA[y]
        console.log(`[MSG ${lMsg.id}] ${lMsg.content.text.text}`)
      } 
    } catch (e) {
      console.log('e', e) 
    } 
  }
e' }))
}

async function getChat(lChatId) {
  return client.invoke({
    _: 'getChat',
    chat_id: lChatId
  })
}

async function getChats(limit) {
  return client.invoke({
    _: 'getChats',
    offset_order: '9223372036854775807',
    offset_chat_id: 0,
    limit
  })
}

main()